PCD reamer with stepped counter bore

Abstract

The utility model discloses a PCD reamer with a stepped counter bore. The PCD reamer comprises a main tool bit, a reaming tool bit rod, a spring and a fine adjustment nut. An optical shaft rod is arranged on the main cutter head; the lower part of the broaching tool bit rod is a spline shaft sleeve, and the center of the upper part of the broaching tool bit rod is in a hollow tube shape; a partition plate is arranged between the spline shaft sleeve and the hollow tube; shaft rod through holes are formed in the middles of the partition plates; the polished shaft rod is sleeved in the shaft rod through hole; adjusting screw rods are arranged at the upper ends of the polished shaft rods; the upper end of the spring abuts against the lower end face of the partition plate. The fine tuning nut is screwed on the adjusting screw rod; a drilling PCD blade is arranged below the main cutter head; a reaming PCD blade is arranged below the reaming tool bit rod; according to the technical scheme, the spot facing PCD blade and the drilling PCD blade cut openings in sequence by adjusting the fine adjustment nut, and single counter bore machining is completed; and the problem of multiple tool changing procedures during single-time counter bore opening is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical drilling equipment, and particularly relates to a PCD reamer for opening stepped countersinks. Background Art

[0002] At present, in the mechanical processing process, the countersinking process is often used for the screw holes on metal components. Such holes generally have no bottom hole, and the cutting allowance is large. The pure alloy drill bit is expensive, the processing efficiency is low, and the service life is short. The processing of a countersink screw hole requires not only the use of a screw hole opening tool, but also a countersinking tool. First, a countersinking tool is used to cut the pre-hole, and then the reaming tool is replaced to reaming the hole to complete the countersinking process. This countersinking process is cumbersome and cannot be completed in one go, which affects the processing speed. Summary of the Invention

[0003] The present invention aims to solve the above problems and provides a PCD reamer for opening stepped countersinks.

[0004] A PCD reamer for opening stepped countersinks, comprising: a main cutter head 1, a reaming cutter head rod 2, a spring 3, and a fine-tuning nut 4; a smooth shaft rod 15 is provided on the upper part of the main cutter head 1; the lower part of the reaming cutter head rod 2 is a spline sleeve 21, and the center of the upper part of the reaming cutter head rod 2 is a hollow tube; a partition 25 is provided between the spline sleeve 2 and the hollow tube; a shaft through hole is provided in the middle of the partition 25; the smooth shaft rod 15 is sleeved in the shaft through hole; an adjusting screw 16 is provided at the upper end of the smooth shaft rod 15; the spring 3 is sleeved on the smooth shaft rod 15, and its upper end rests on the lower end surface of the partition 25; the fine-tuning nut 4 is screwed on the adjusting screw 16; a drilling PCD blade 14 is provided below the main cutter head 1; a countersinking PCD blade 23 is provided below the reaming cutter head rod 2, and the fine-tuning nut 4 can adjust the order in which the drilling PCD blade 14 and the countersinking PCD blade 23 cut the opening surfaces.

[0005] A hole drill bit 11 is provided at the front end axis center below the main cutting head 1, and a push rod 12 is provided at the upper end of the hole drill bit 11; above the push rod 12 is a spline shaft 13; drilling PCD blades 14 are provided at the bottom ends of both sides of the spline shaft 13; an optical shaft rod 15 is provided at the upper end of the spline shaft 13; a spring countersunk hole 131 is provided at the connection between the spline shaft 13 and the optical shaft rod 15.

[0006] The spline sleeve 21 is provided with open grooves 22 on both sides of the lower end thereof, and the PCD inserts 14 drilled on both sides can slide in the open grooves 22 on both sides of the spline sleeve 21; the open grooves 22 on both sides are on the same axis; the spline sleeve 21 is provided with countersunk PCD inserts 23 on both sides of the facade; the countersunk PCD inserts 23 on both sides are on the same axis, and the axis is perpendicular to the axis of the open grooves 22 on both sides, and the vertical point intersects at the axis of the spline sleeve 21.

[0007] The upper part of the shaft of the reaming cutter head rod 2 is provided with an abutment edge; the upper part of the abutment edge is provided with a polygonal column 24, and the polygonal column 24 is connected to the main shaft of the drilling machine tool.

[0008] The diameter of the push rod 12 is slightly larger than the diameter of the hole of the drilling bit 11 ; the diameter of the optical shaft rod 15 is smaller than the diameter of the spline shaft 13 .

[0009] The aperture of the spot facing PCD insert 23 is larger than the aperture of the hole drilled by the PCD insert 14 .

[0010] The spline sleeve 21 is transitionally matched with the spline shaft 13 .

[0011] The present invention provides a PCD reamer for opening stepped countersinks, which comprises: a main cutter head 1, a reaming cutter head rod 2, a spring 3, and a fine-tuning nut 4; a light shaft rod 15 is provided on the upper portion of the main cutter head 1; the lower portion of the reaming cutter head rod 2 is a spline shaft sleeve 21, and the center of the upper portion of the reaming cutter head rod 2 is a hollow tube; a partition 25 is provided between the spline shaft sleeve 2 and the hollow tube; a shaft through hole is provided in the middle of the partition 25; the light shaft rod 15 is sleeved in the shaft through hole; the upper end of the light shaft rod 15 is provided with a Adjusting screw 16; spring 3 is sleeved on the optical axis rod 15, and its upper end is against the lower end surface of the partition 25; fine-tuning nut 4 is screwed on the adjusting screw 16; a drilling PCD blade 14 is provided under the main cutting head 1; a countersinking PCD blade 23 is provided under the reaming cutter head rod 2; this technical solution realizes the sequential cutting of the countersinking PCD blade 23 and the drilling PCD blade 14 by adjusting the fine-tuning nut 4 to complete the single countersinking process; and reduces the problem of multiple tool changes in a single countersinking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an overall schematic diagram of a PCD reamer for opening stepped countersinks in the present invention;

[0013] Figure 2 This is a partial cross-sectional schematic diagram of a PCD reamer for opening stepped countersinks in the present invention;

[0014] Figure 3 This is a schematic diagram of the main cutting head structure of a PCD reamer for opening stepped countersinks in the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the structure of a reaming cutter head of a PCD reamer for opening stepped countersinks. DETAILED DESCRIPTION

[0016] The technical solution will be further clearly and completely described below in conjunction with the accompanying drawings of the technical solution. The described embodiments are only a part of the technical solution, not all embodiments. Based on the technical solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this utility model.

[0017] Example 1

[0018] See also Figures 1 to 4 As shown, a PCD reamer for opening stepped countersinks comprises: a main cutting head 1, a reaming cutting head rod 2, a spring 3, and a fine-tuning nut 4;

[0019] A hole drill bit 11 is provided at the front end axis center below the main cutting head 1, and a stop rod 12 is provided at the upper end of the hole drill bit 11; a spline shaft 13 is provided above the stop rod 12; drilling PCD blades 14 are provided at the bottom ends of both sides of the spline shaft 13; an optical shaft rod 15 is provided at the upper end of the spline shaft 13; a spring countersunk hole 131 is provided at the connection between the spline shaft 13 and the optical shaft rod 15; an adjusting screw 16 is provided at the upper end of the optical shaft rod 15;

[0020] The support rod 12 is cylindrical and is an axial rotating body. The diameter of the support rod 12 is slightly larger than the hole diameter of the drilling bit 11 ; the diameter of the optical shaft rod 15 is smaller than the diameter of the spline shaft 13 .

[0021] The lower portion of the reaming cutter head rod 2 is a spline sleeve 21, and the center of the upper portion of the reaming cutter head rod 2 is a hollow tube; a partition 25 is provided between the spline sleeve 2 and the hollow tube; open grooves 22 are provided on both sides of the lower end of the spline sleeve 21, and the PCD blades 14 drilled on both sides can slide in the open grooves 22 provided on both sides of the spline sleeve 21; the open grooves 22 on both sides are on the same axis; spot-faced PCD blades 23 are provided on both sides of the outer surface of the spline sleeve 21; the spot-faced PCD blades 23 on both sides are on the same axis, and the axis is perpendicular to the axis of the open grooves 22 on both sides, and the vertical point intersects at the axis center of the spline sleeve 21;

[0022] The reaming cutter head rod 2 is provided with an abutment edge on the upper part of the rod body; a polygonal column 24 is provided on the upper part of the abutment edge; the rod body, the abutment edge and the polygonal column 24 of the reaming cutter head rod 2 are integrally formed; a shaft through hole is provided in the middle of the partition 25;

[0023] The spring 3 is a compression spring, which is sleeved on the spline shaft 13; the shaft through hole is sleeved on the upper end of the spline shaft 13; the shaft through hole and the spline shaft 13 are clearance-matched; the lower end of the fine-tuning nut 4 abuts against the upper end surface of the partition 25; the lower end of the spring 3 abuts against the spring countersunk hole 131; the upper end of the spring 3 abuts against the lower end surface of the partition 25; the fine-tuning nut 4 is screwed onto the adjusting screw 16;

[0024] The aperture of the spot facing PCD insert 23 is larger than the aperture of the hole drilled by the PCD insert 14;

[0025] The polygonal column 24 on the rod body of the reaming cutter head rod 2 is connected to the spindle of the hole opening machine tool; the countersinking PCD blade 23 and the drilling PCD blade 14 are spaced apart by the spring 3, and the drilling PCD blade 14 and the countersinking PCD blade 23 are fed secondary to cut the hole; the fine-tuning nut 4 can adjust the drilling PCD blades 14 on both sides to be retracted into the opening slot 22 or the cutting part of the drilling PCD blade 14 to protrude from the opening slot 22; that is, adjusting the fine-tuning nut 4 can adjust the order of the countersinking PCD blade 23 cutting the hole surface and the drilling PCD blade 14 cutting the hole surface; the drilling PCD blade 14 and the countersinking PCD blade 23 cut the opening in sequence (mechanical secondary processing feed) to complete the single countersinking process.

[0026] The preferred cutting feed and hole opening method using this technical solution is:

[0027] The PCD reamer for drilling stepped countersinks is connected to the spindle of the drilling machine tool, and the edge of the reamer rests on the clamping part of the spindle of the drilling machine tool; the spindle of the drilling machine tool feeds downward, and the drilling drill bit 11 pre-cuts and positions the screw hole with the countersink. When the drilling drill bit 11 drills a certain depth, the PCD blade 14 is inserted to start countersinking and cutting. After the drilling of the drilling drill bit 11 is completed, the rod 12 rests on the edge of the hole of the drilling drill bit 11; finally, the PCD countersinking blade 23 performs a second feed cutting to complete the countersinking process.

Claims

1. A PCD reamer for opening stepped countersinks, characterized by: It comprises a main cutting head (1), a reaming cutting head rod (2), a spring (3), and a fine-tuning nut (4); a light shaft rod (15) is provided on the upper part of the main cutting head (1); the lower part of the reaming cutting head rod (2) is a spline shaft sleeve (21), and the center of the upper part of the reaming cutting head rod (2) is a hollow tube; a partition (25) is provided between the spline shaft sleeve (21) and the hollow tube; a shaft through hole is provided in the middle of the partition (25); the light shaft rod (15) is sleeved in the shaft through hole; the light shaft rod (15) ) is provided with an adjusting screw (16) at the upper end; a spring (3) is sleeved on the optical axis rod (15), and its upper end abuts against the lower end surface of the partition (25); a fine-tuning nut (4) is screwed on the adjusting screw (16); a drilling PCD blade (14) is provided below the main cutting head (1); a countersinking PCD blade (23) is provided below the reaming head rod (2), and the fine-tuning nut (4) can adjust the order of cutting the opening surface of the drilling PCD blade (14) and the countersinking PCD blade (23).

2. The PCD reamer for opening stepped countersinks according to claim 1, characterized in that: A hole drill bit (11) is provided at the front end axis center below the main cutting head (1), and a push rod (12) is provided at the upper end of the hole drill bit (11); a spline shaft (13) is provided above the push rod (12); drilling PCD blades (14) are provided at the bottom ends of both sides of the spline shaft (13); an optical shaft rod (15) is provided at the upper end of the spline shaft (13); and a spring countersunk hole (131) is provided at the connection between the spline shaft (13) and the optical shaft rod (15).

3. The PCD reamer for opening stepped countersinks according to claim 2, characterized in that: The lower end of the spline sleeve (21) is provided with open grooves (22) on both sides, and the PCD blades (14) drilled on both sides can slide in the open grooves (22) on both sides of the spline sleeve (21); the open grooves (22) on both sides are on the same axis; the outer surface of the spline sleeve (21) is provided with countersunk PCD blades (23); the countersunk PCD blades (23) on both sides are on the same axis, and the axis is perpendicular to the axis of the open grooves (22) on both sides, and the vertical point intersects at the axis of the spline sleeve (21).

4. The PCD reamer for opening stepped countersinks according to claim 3, characterized in that: The upper part of the reaming cutter head rod (2) is provided with an abutment edge; the upper part of the abutment edge is provided with a polygonal column (24), and the polygonal column (24) is connected to the main shaft of the drilling machine tool.

5. The PCD reamer for opening stepped countersinks according to claim 4, characterized in that: The diameter of the push rod (12) is slightly larger than the diameter of the hole of the drilling bit (11); the diameter of the optical shaft rod (15) is smaller than the diameter of the spline shaft (13).

6. The PCD reamer for opening stepped countersinks according to claim 4, characterized in that: The aperture of the spot facing PCD blade (23) is larger than the aperture of the drilling PCD blade (14).

7. The PCD reamer for opening stepped countersinks according to claim 4, characterized in that: The spline shaft sleeve (21) and the spline shaft (13) are transitionally matched.

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